Air supply switching device for air supply system

Abstract

The application relates to an air source switching device for an air supply system, which comprises a pipeline assembly and a switching valve assembly, the pipeline assembly comprises a first air inlet pipeline, a second air inlet pipeline and an air outlet pipeline, the first air inlet pipeline and the second air inlet pipeline are connected in parallel at the air inlet end of the air outlet pipeline, the end faces of the air outlet ends of the first air inlet pipeline and the second air inlet pipeline are concave arc faces, the switching valve assembly comprises a spherical valve core and an electromagnetic adsorber, the surface of the spherical valve core is coated with a permanent magnet layer, the spherical valve core is connected with the pipeline assembly and can swing between the air outlet openings of the first air inlet pipeline and the second air inlet pipeline to shield or open the air outlet openings, and the electromagnetic adsorber is arranged on the pipeline assembly and is used for driving the spherical valve core to move. The air source switching device for the air supply system can guarantee the sealing reliability of the air duct opening shielding, is flexible in air source switching, has a simple structure and is low in operation cost.

Description

Technical Field

[0001] This invention relates to the field of air supply equipment technology, and more specifically, to an air source switching device for an air supply system. Background Technology

[0002] Fresh air systems are now widely available. These are independent air handling systems consisting of a fresh air exchanger and ductwork accessories. They filter and purify outdoor air before delivering it indoors through ducts. The air supply duct system of these systems typically requires a three-way valve to switch the air source. However, the air source switching devices in these technologies suffer from poor sealing due to low fit between the valve body and the duct opening. Furthermore, the valve switching process is cumbersome and has high operating costs. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose an air source switching device for an air supply system. When switching air sources, the device can drive a spherical valve core towards the original air source duct via an electromagnetic adsorber to block the air outlet of the inlet duct, thus opening another inlet duct to complete the air source switching. Since the air outlet end of the inlet duct is set as a concave arc surface, the arc surface can fit and contact the outer surface of the spherical valve core, resulting in a large sealing contact area and good sealing effect. Furthermore, this application only needs to control the magnitude and direction of the current of the electromagnetic adsorber to control the movement trajectory of the spherical valve core, thereby flexibly controlling the air source switching. The structure is simple, the operation is convenient, and the operating cost is low.

[0005] An embodiment of the present invention provides an air source switching device for an air supply system, comprising: a pipe assembly including a first air inlet pipe, a second air inlet pipe, and an air outlet pipe, wherein the first air inlet pipe and the second air inlet pipe are connected in parallel at the air inlet end of the air outlet pipe, and the end faces of the air outlet ends of the first air inlet pipe and the second air inlet pipe are both concave arc-shaped surfaces; and a switching valve assembly including a spherical valve core and an electromagnetic adsorber, wherein the surface of the spherical valve core is covered with a permanent magnet layer, the spherical valve core is connected to the pipe assembly and can swing between the air outlet of the first air inlet pipe and the air outlet of the second air inlet pipe to block or open the air outlet, and the electromagnetic adsorber is disposed on the pipe assembly and is used to drive the spherical valve core to move.

[0006] This invention relates to an air source switching device for an air supply system. A first and second air inlet pipe are connected in parallel at the inlet end of an outlet pipe, and both the inlet and outlet ends of the first and second air inlet pipes are concave arc surfaces. A spherical valve core can swing between the outlets of the first and second air inlet pipes to block or open the outlet. The surface of the spherical valve core is covered with a permanent magnet layer. An electromagnetic adsorber is mounted on the pipe assembly to drive the spherical valve core. Therefore, when switching air sources is required, the electromagnetic adsorber can drive the spherical valve core towards the original air source duct to block the outlet of that inlet pipe, thus opening the other inlet pipe to complete the air source switching. Because the outlet end of the inlet pipe is a concave arc surface, the arc surface can fit and contact the outer surface of the spherical valve core, resulting in a large sealing contact area and good sealing effect. Furthermore, this application only needs to control the magnitude and direction of the current of the electromagnetic adsorber to control the trajectory of the spherical valve core, thereby flexibly controlling the air source switching. The structure is simple, the operation is convenient, and the operating cost is low.

[0007] In some embodiments, the spherical valve core is connected at the connection between the first air inlet pipe and the second air inlet pipe.

[0008] In some embodiments, the air outlet end of the first air inlet duct and / or the air outlet end of the second air inlet duct are provided with a sealing ring extending around the circumference of the duct.

[0009] In some embodiments, the electromagnetic adsorber includes a first electromagnetic adsorber and a second electromagnetic adsorber, wherein the first electromagnetic adsorber is disposed on the first air inlet duct and the second electromagnetic adsorber is disposed on the second air inlet duct.

[0010] In some embodiments, both the first air inlet duct and the second air inlet flue include an inner tube and an outer tube. The outer tube covers the outer periphery of the inner tube and is a metal tube. The outer tube has an assembly hole that extends through it along its axial direction. The electromagnetic adsorber includes a pneumatic rod and an electromagnet. The pneumatic rod passes through the assembly hole and its end extends to the air outlet side. The electromagnet is located on the extended end of the pneumatic rod. The pneumatic rod can extend and retract along its axial direction.

[0011] In some embodiments, the electromagnetic adsorber further includes a shock-absorbing spring disposed between the electromagnet and the pneumatic rod.

[0012] In some embodiments, the contact surface between the electromagnet and the spherical valve core is a concave arc-shaped surface.

[0013] In some embodiments, the first electromagnetic adsorbent is a plurality of units arranged circumferentially along the first air inlet duct; and / or, the second electromagnetic adsorbent is a plurality of units arranged circumferentially along the second air inlet duct.

[0014] In some embodiments, the spherical valve core is a hollow structural component.

[0015] In some embodiments, an electromagnetic adsorption layer is provided on the inner wall surface of the first air inlet duct and / or the second air inlet duct. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the air source switching device for an air supply system according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the outer tube of the air source switching device for the air supply system according to an embodiment of the present invention.

[0018] Figure label:

[0019] First air inlet duct 1, second air inlet duct 2, air outlet duct 3, spherical valve core 4, first electromagnetic adsorber 5, second electromagnetic adsorber 6, pneumatic rod 7, shock absorber spring 8, electromagnet 9, sealing ring 10, inner tube 11, outer tube 12, assembly hole 13. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] like Figures 1 to 2 As shown, the air source switching device for the air supply system in this embodiment of the invention includes a pipe assembly and a switching valve assembly.

[0022] Specifically, the duct assembly includes a first air inlet duct 1, a second air inlet duct 2, and an air outlet duct 3. The first air inlet duct 1 and the second air inlet duct 2 are connected in parallel at the air inlet end of the air outlet duct 3, and the end faces of the air outlet ends of the first air inlet duct 1 and the second air inlet duct 2 are both concave arc-shaped surfaces. The switching valve assembly includes a spherical valve core 4 and an electromagnetic adsorber. The surface of the spherical valve core 4 is covered with a permanent magnet layer. The spherical valve core 4 is connected to the duct assembly and can swing between the air outlet of the first air inlet duct 1 and the air outlet of the second air inlet duct 2 to block or open the air outlet. The electromagnetic adsorber is disposed on the duct assembly and is used to drive the spherical valve core 4 to move.

[0023] Understandably, the electromagnetic adsorber can generate magnetic attraction to drive the spherical valve core 4 to swing. When it is necessary to switch to the first air inlet duct 1 as the air inlet channel, the electromagnetic adsorber can drive the spherical valve core 4 to swing toward the air outlet of the second air inlet duct 2 until the spherical valve core 4 contacts the air outlet of the second air inlet duct 2. Since the air inlet end is designed as a concave arc surface, the arc surface can fit and contact the outer surface of the spherical valve core 4 to ensure the sealing effect. Similarly, when it is necessary to switch to the second air inlet duct 2 as the air inlet channel, the electromagnetic adsorber can drive the spherical valve core 4 to swing toward the air outlet of the first air inlet duct 1.

[0024] It should be noted that the driving force of the electromagnetic adsorber can be adjusted by controlling the magnitude of the current, and the direction of the force can be adjusted by changing the direction of the current. Therefore, the movement trajectory of the ball valve core 4 can be controlled simply by controlling the magnitude and direction of the current, thereby flexibly controlling the switching of the air source. The operation is convenient and the structure is simple.

[0025] In this embodiment of the invention, an air source switching device for an air supply system includes a first air inlet pipe 1 and a second air inlet pipe 2 connected in parallel at the air inlet end of an air outlet pipe 3. Both the air outlet ends of the first and second air inlet pipes 1 and 2 are concave arc surfaces. A spherical valve core 4 can swing between the air outlets of the first and second air inlet pipes 1 and 2 to block or open the air outlets. The surface of the spherical valve core 4 is covered with a permanent magnet layer. An electromagnetic adsorber is mounted on the pipe assembly to drive the movement of the spherical valve core 4. Therefore, when it is necessary to switch the air source, the device can be switched via an electromagnetic adsorber. The adsorber drives the spherical valve core 4 to move toward the original air source duct to block the air outlet of the air inlet duct. Then, another air inlet duct opens to complete the air source switching. Since the air outlet end of the air inlet duct is set as a concave arc surface, the arc surface can fit and contact the outer surface of the spherical valve core 4. The sealing contact surface is large and the sealing effect is good. Moreover, this application only needs to control the magnitude and direction of the current of the electromagnetic adsorber to realize the control of the movement trajectory of the spherical valve core 4, thereby flexibly controlling the air source switching. The structure is simple, the operation is convenient, and the operating cost is low.

[0026] In some embodiments, such as Figure 1 As shown, the spherical valve core 4 is connected at the connection between the first air inlet pipe 1 and the second air inlet pipe 2. Figure 1 As shown, the first air inlet pipe 1, the second air inlet pipe 2, and the air outlet pipe 3 are arranged in a Y-shape. The connection between the first air inlet pipe 1 and the second air inlet pipe 2 is opposite to the inlet of the air outlet pipe 3. When the spherical valve core 4 is located at the connection between the first air inlet pipe 1 and the second air inlet pipe 2, the distance between the spherical valve core 4 and the air outlet of the first air inlet pipe 1 and the second air inlet pipe 2 is equal when the spherical valve core 4 is in normal condition. This allows the position switching of the spherical valve core 4 to be achieved with minimal drive stroke, and the air source switching is flexible.

[0027] In some embodiments, the air outlet end of the first air inlet duct 1 and / or the air outlet end of the second air inlet duct 2 are provided with a sealing ring 10 extending around the circumference of the duct. In other words, a sealing ring 10 is provided on the end face of the air outlet end of the first air inlet duct 1 and the air outlet end of the second air inlet duct 2. The sealing ring 10 contacts the spherical valve core 4 and can utilize its deformation characteristics to improve the tightness of the adhesion, thereby further improving the sealing effect.

[0028] Optionally, the sealing ring 10 is a rubber sealing ring 10, which can utilize the deformation of the rubber to play a shock-absorbing and buffering role when in contact with the ball valve core 4.

[0029] Alternatively, the sealing ring 10 can be made of other materials, as long as the sealing performance can be met.

[0030] In some embodiments, such as Figure 1 As shown, the electromagnetic adsorber includes a first electromagnetic adsorber 5 and a second electromagnetic adsorber 6. The first electromagnetic adsorber 5 is disposed on the first air inlet duct 1, and the second electromagnetic adsorber 6 is disposed on the second air inlet duct 2. Specifically, as... Figure 1 As shown, the first electromagnetic adsorber 5 is installed on the first air inlet duct 1, with its adsorption end extending to the air outlet side of the first air inlet duct 1. The second electromagnetic adsorber 6 is installed on the second air inlet duct 2, with its adsorption end extending to the air outlet side of the second air inlet duct 2. Taking the first air inlet duct 1 as the initial air source duct as an example, at this time, the spherical valve core 4 blocks the air outlet of the second air inlet duct 2. When it is necessary to switch the air source, the first electromagnetic adsorber 5 is energized and generates an adsorption force, and the second electromagnetic adsorber 6 is supplied with a reverse current and generates a repulsive force. Under the action of the two phases, combined with the airflow driving force of the second air inlet duct 2, the spherical valve core 4 can be pushed to the air outlet of the first air inlet duct 1. At this time, the spherical valve core 4 blocks the air outlet of the first air inlet duct 1, and the air outlet of the second air inlet duct 2 is opened, and the air source switching is completed.

[0031] Furthermore, such as Figure 1 and Figure 2 As shown, both the first air inlet duct 1 and the second air inlet flue include an inner tube 11 and an outer tube 12. The outer tube 12 covers the outer periphery of the inner tube 11 and is a metal tube. The outer tube 12 is provided with an assembly hole 13 that extends through it along its axial direction. The electromagnetic adsorber includes a pneumatic rod 7 and an electromagnet 9. The pneumatic rod 7 passes through the assembly hole 13 and its end extends to the air outlet side. The electromagnet 9 is provided on the extended end of the pneumatic rod 7. The pneumatic rod 7 can extend and retract along its axial direction.

[0032] In other words, the air inlet duct is a double-layered duct. The inner duct 11 is used to transport airflow, while the outer duct 12 can serve as a protective and support layer, protecting the inner duct 11 while also being used to install the electromagnetic adsorber, ensuring the structural strength of the installation location of the electromagnetic adsorber.

[0033] Furthermore, the telescopic nature of the pneumatic rod 7 allows for adjustments to its extension and retraction, thereby altering the adsorption force on the spherical valve core 4 and the tightness of the seal between the spherical valve core 4 and the air duct opening. For example, taking the first air inlet duct 1 as the air source duct, when switching air sources is required, the pneumatic rod 7 of the first electromagnetic adsorber 5 can extend one end, bringing the electromagnet on the pneumatic rod 7 closer to the spherical valve core 4 to increase its adsorption force. After the electromagnet 9 comes into contact with the spherical valve core 4, the pneumatic rod 7 retracts to move the spherical valve core 4 to the air outlet of the first air inlet duct 1, thus achieving air source switching.

[0034] Furthermore, with long-term use of the equipment, the seal may become loose. In this case, the electromagnetic adsorption force can be adjusted and the retraction of the pneumatic rod 7 can be increased to make the ball valve core 4 fit more tightly with the air outlet, thus compensating for the loosening and poor sealing caused by long-term use.

[0035] In some embodiments, the electromagnetic adsorber further includes a damping spring 8, which is disposed between the electromagnet 9 and the pneumatic rod 7. Figure 1 As shown, the shock-absorbing spring 8 is sleeved on the pneumatic rod 7 and its end is connected to the electromagnet. Thus, when the electromagnet 9 comes into contact with the spherical valve core 4 and when the spherical valve core 4 blocks the air outlet, the shock-absorbing spring 8 can play a shock-absorbing role.

[0036] In some embodiments, such as Figure 1 As shown, the contact surface between the electromagnet 9 and the spherical valve core 4 is a concave arc-shaped surface. In other words, the adsorption surface of the electromagnet 9 matches the outer curved surface of the spherical valve core 4, which facilitates a tighter adsorption bond and makes the adsorption of the electromagnet 9 more reliable.

[0037] In some embodiments, the first electromagnetic adsorbers 5 are a plurality of units arranged at intervals along the circumference of the first air inlet duct 1, and / or the second electromagnetic adsorbers 6 are a plurality of units arranged at intervals along the circumference of the second air inlet duct 2.

[0038] like Figure 2 As shown, the outer tube 12 is provided with two symmetrical assembly holes 13, and each assembly hole 13 corresponds to an electromagnetic adsorber. Multiple electromagnetic adsorbers can improve the adsorption reliability of the spherical valve core 4, thereby improving the operational reliability of the gas source switching control process.

[0039] Optionally, the spherical valve core 4 is a hollow structure. Therefore, the spherical valve core 4 is lightweight, which reduces the adsorption force required by the electromagnetic adsorber, simplifies control, and avoids the adsorption detachment problem that might occur due to excessive weight.

[0040] In some embodiments, an electromagnetic adsorption layer is provided on the inner wall surface of the first air inlet duct 1 and / or the second air inlet duct 2. Therefore, the electromagnetic adsorption layer can meet the dust removal requirements during specific periods and is suitable for fluid control scenarios in high-dust environments.

[0041] For example, during the poplar catkin season or periods with more dust, the electromagnetic adsorption layer can capture dust and other foreign objects when airflow passes through, thereby keeping the inside of the pipe clean, ensuring the air supply effect, extending the maintenance cycle of the equipment, and reducing the failure rate.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A gas source switching device for an air supply system, characterized in that, include: A duct assembly, comprising a first air inlet duct, a second air inlet duct, and an air outlet duct, wherein the first air inlet duct and the second air inlet duct are connected in parallel at the air inlet end of the air outlet duct, and the end faces of the air outlet end of the first air inlet duct and the air outlet end of the second air inlet duct are both concave arc-shaped surfaces. A switching valve assembly includes a spherical valve core and an electromagnetic adsorber. The surface of the spherical valve core is covered with a permanent magnet layer. The spherical valve core is connected to the pipe assembly and can swing between the air outlet of the first air inlet pipe and the air outlet of the second air inlet pipe to block or open the air outlet. The electromagnetic adsorber is disposed on the pipe assembly and is used to drive the movement of the spherical valve core.

2. The air source switching device for an air supply system according to claim 1, characterized in that, The spherical valve core is connected at the connection between the first air inlet pipe and the second air inlet pipe.

3. The air source switching device for an air supply system according to claim 1, characterized in that, The air outlet end of the first air inlet duct and / or the air outlet end of the second air inlet duct are provided with a sealing ring extending around the circumference of the duct.

4. The air source switching device for an air supply system according to claim 1, characterized in that, The electromagnetic adsorber includes a first electromagnetic adsorber and a second electromagnetic adsorber, wherein the first electromagnetic adsorber is disposed on the first air inlet duct and the second electromagnetic adsorber is disposed on the second air inlet duct.

5. The air source switching device for an air supply system according to claim 4, characterized in that, Both the first air inlet duct and the second air inlet flue include an inner tube and an outer tube. The outer tube covers the outer periphery of the inner tube and is a metal tube. The outer tube has an assembly hole that extends through it along its axial direction. The electromagnetic adsorber includes a pneumatic rod and an electromagnet. The pneumatic rod passes through the assembly hole and its end extends to the air outlet side. The electromagnet is located on the extended end of the pneumatic rod. The pneumatic rod can extend and retract along its axial direction.

6. The air source switching device for an air supply system according to claim 5, characterized in that, The electromagnetic adsorber also includes a shock-absorbing spring, which is disposed between the electromagnet and the pneumatic rod.

7. The air source switching device for an air supply system according to claim 5, characterized in that, The contact surface between the electromagnet and the spherical valve core is a concave arc-shaped surface.

8. The air source switching device for an air supply system according to claim 5, characterized in that, The first electromagnetic adsorbent is a plurality of units arranged at intervals along the circumference of the first air inlet duct; and / or, the second electromagnetic adsorbent is a plurality of units arranged at intervals along the circumference of the second air inlet duct.

9. The air source switching device for an air supply system according to any one of claims 1-8, characterized in that, The spherical valve core is a hollow structural component.

10. The air source switching device for an air supply system according to any one of claims 1-8, characterized in that, An electromagnetic adsorption layer is provided on the inner wall surface of the first air inlet duct and / or the second air inlet duct.

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